High summer temperatures combined with air pollution can cause ground-level ozone to form, which has serious effects on health, especially for older people or children, or those with asthma and other breathing problems. The European Environment Agency (EEA) presents some useful information on protecting your health from ground-level ozone this summer.

This report presents particulate matter (PM10) and ground‑level ozone concentration maps covering the whole of Europe. The interpolated maps are based on a combination of measurement and regional modelling results. Using measured concentrations as a primary source of information, the report summarizes the methodologies and the methodological choices taken in order to derive such maps.